<template>
    <div>
        <!--面包屑导航区域-->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item><a href="/">角色管理</a></el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!--卡片列表-->
        <el-card>
            <!--添加角色区域-->
            <el-row :gutter="20">
                <el-col :span="4">
                    <el-button type="primary" @click="addDialogVisible = true"><i class="el-icon-plus"></i>添加角色</el-button>
                </el-col>
            </el-row>

            <!--角色列表区域-->
            <el-table :data="roleList" border stripe>
                <!--展开列-->
                <el-table-column type="expand">
                    <template v-slot="scope">
                        <el-row :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                            <!--渲染一级权限-->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!--渲染二级、三级权限-->
                            <el-col :span="19">
                                <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span ="6">
                                        <el-tag
                                                closable
                                                @close="removeRightById(scope.row,item2.id)"
                                                type="success">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag
                                                type="warning"
                                                v-for="(item3,i3) in item2.children"
                                                :key="item3.id"
                                                closable
                                                @close="removeRightById(scope.row,item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>

                        </el-row>
                    </template>
                </el-table-column>
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作">
                    <template v-slot="scope">
                        <!--编辑按钮-->
                        <el-tooltip effect="dark" content="编辑" placement="top-start" :enterable="false">
                            <el-button type="primary" size="mini" icon="el-icon-edit" @click=""></el-button>
                        </el-tooltip>
                        <!--删除按钮-->
                        <el-tooltip effect="dark" content="删除" placement="top-start" :enterable="false">
                            <el-button type="danger" size="mini" icon="el-icon-delete" @click=""></el-button>
                        </el-tooltip>
                        <!--分配角色按钮-->
                        <el-tooltip effect="dark" content="分配角色" placement="top-start" :enterable="false">
                            <el-button  type="warning" size="mini" icon="el-icon-setting" @click="showSetRightDialog(scope.row)"></el-button>
                        </el-tooltip>
                    </template>

                </el-table-column>
            </el-table>
        </el-card>

        <!--分配权限的对话框-->
        <el-dialog
                title="分配权限"
                :visible.sync="setRightDialogVisible"
                width="50%" @close="setRightDialogClose">
            <!--内容主体区-->
            <span>
                <el-tree
                        :data="rightsList"
                        :props="treeProps"
                        show-checkbox
                        default-expand-all
                        node-key="id"
                        :default-checked-keys="defKeys"
                        ref="treeRef">

                </el-tree>
            </span>
            <!--底部区域-->
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>

    </div>

</template>

<script>
    export default {
        data(){
            return {
                //所有角色列表数据
                roleList:[],
                //控制分配权限对话框的显示与隐藏
                setRightDialogVisible:false,
                //所有权限的数据
                rightsList:[],
                //树形控件的树形绑定对象
                treeProps:{
                    label:'authName',
                    children:'children'
                },
                //默认选中的节点ID的数组
                defKeys:[],
                //即将分配权限的角色Id
                roleId:''
            }
        },
        created(){
            this.getRolesList()
        },
        methods:{
            //获取所有角色的列表
            async getRolesList(){
                const {data:res} =  await this.$http.get("roles");
                if (res.meta.status !==200){
                    return this.$message.error('获取角色列表失败！')
                }

                this.roleList = res.data;
                console.log(this.roleList);
            },
            //根据ID删除对应的标签
            async removeRightById(role,rightId){
                //询问客户是否确认删除
                const res = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err )
                //如果用户确认删除，则返回值为字符串 confirm
                //如果用户取消删除，则返回值为字符串 cancel
                if (res !== 'confirm'){
                    return this.$message.info('已经取消了删除！');
                }

                const {data:delRes} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                if (delRes.meta.status !==200) {
                    return this.$message.error('删除权限失败！');
                }
                this.$message.success('删除权限成功！')
                role.children = delRes.data;

            },
            //展示分配权限的对话框
            async showSetRightDialog(role){
                this.roleId = role.id

                //获取所有权限数据
                const {data:res} = await this.$http.get('rights/tree')
                if (res.meta.status !==200){
                    return this.$message.error('获取权限数据失败！');
                }

                //console.log(res);
                //把获取到的权限数据保存到data中
                this.rightsList = res.data;
                //console.log(this.rightList);

                //递归获取三级节点的ID
               this.getLeafKeys(role,this.defKeys);

                this.setRightDialogVisible = true;
            },
            //默认选中的节点Id值数组，并保存到defKeys数组中
            getLeafKeys(node,arr){
                //如果当前的node不包含children则是三级节点
                if (!node.children){
                    return arr.push(node.id);
                }

                node.children.forEach(item=>
                    this.getLeafKeys(item,arr)
                )

            },
            //监听对话框的关闭事件
            setRightDialogClose(){
                this.defKeys = [];
            },
            //点击为角色添加事件
            async allotRights(){
                const keys = [
                        ...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys(),
                ]
                const idStr = keys.join(',');

               const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr});
               
               if (res.meta.status !=200) {
                   return this.$message.error('分配权限失败！');
               }

               this.$message.success('分配权限成功！');
               this.getRolesList();
               this.setRightDialogVisible = false;
            }

        }
    }
</script>

<style scoped>
    .el-icon-plus{
        position: relative;
        right: 3px;
    }
    .el-tag{
        margin: 7px;
    }
    .bdtop{
        border-top: 1px solid #eee;
    }
    .bdbottom{
        border-bottom: 1px solid #eee;
    }
    .vcenter{
        display: flex;
        align-items: center;
    }


</style>